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EMC1822 데이터시트(PDF) 36 Page - Microchip Technology

부품명 EMC1822
상세설명  Multi-Channel Low Voltage Temp Sensors with Shutdown
PDF  103 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

EMC1822 데이터시트(HTML) 36 Page - Microchip Technology

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Table 8-7. Receive Byte Protocol
START
Slave Address
RD
ACK
Register Data
NACK
STOP
1 → 0
YYYY_YYY
1
0
XXh
1
0 → 1
8.9
THERM Pin Considerations
Because of the decode method used to determine the System Shutdown Temperature value, it is
important that the pull-up resistance on the THERM pin be within the tolerances shown in Table 7-2.
For tINT_T after power-up, the THERM pin must not be pulled low or the I2C address will not be decoded
properly. If the system requirements do not permit these conditions, the THERM pin must be isolated from
its hard-wired OR’d bus during this time.
One method of isolating this pin is shown in the following figure.
Figure 8-1. THERM Pin Isolation
+3.3V
22K
4.7K-33K
+2.5-5V
Shared THERM
1
2
3
4
VDD
DP
DN
THERM/
ADDR
Multi-Channel Low Voltage Temp Sens...
System Management Bus Protocol
© 2018 Microchip Technology Inc.
Datasheet
DS20006048A-page 36



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